Original species description:

72. Inocybe insinuata C. H. Kauffman, sp. nov.
Pileus slightly fleshy, subovoid, campanulate, finally convex-expanded, obtuse or broadly
subumbonate, 3-5 cm. broad; surface dry, innately silky-fibrillose, chalky white; margin even;
context white; lamellae sinuate-adnexed, narrow, close, whitish then pale-rusty-clay-colored
stipe short, equal above the subemarginate bulb, stuffed to hollow, innately fibrillose-silky,
white, 2.5-4 cm. long, 6-8 mm. thick; spores ellipsoid-ovoid, inequilateral, pale-rusty-tinged
under the microscope, smooth, 8-9 X 4.5-5.5 /¿; cystidia thin-walled, mostly slender, cylindric
to subventricose above a slender pedicel, rarely elliptic and broad, hyaline, scattered on the
sides, inore numerous on the edges of the lamellae, 55-65 X 8-15 n.
Type collected on the ground under pines, on the campus, University of California, Berkeley,
California, January 29, 1915, W. A. Setchell 1063 (herb. N. Y. Bot. Gard.).
DISTRIBUTION: Known only from the type locality.